| 摘要 |
Thermoplastic elastomer blends containing polyvinyl chloride having improved oil resistance and low compression set are made by blending a crosslinked nitrile rubber with a polyvinyl chloride-acrylate copolymer. The amount of nitrile rubber can vary over a wide range as from about 1 part to about 400 parts by weight for every 100 parts by weight of the polyvinyl chloride-acrylate copolymer. The polyvinyl chloride-acrylate copolymer has an inherent viscosity of from about 0.3 to about 4.0 and is made from a vinyl chloride monomer with an optional vinyl component comonomer and one or more acrylate monomers having the formula <IMAGE> wherein R1 is an aliphatic, an aromatic, or combinations thereof, having from 1 to 18 carbon atoms, or a halogen derivative thereof, or hydrogen, and R2 is an aliphatic, an aromatic, an alkyl hydroxyl, or combinations thereof, having from 1 to 18 carbon atoms, or a halogen derivative thereof; or a hydrocarbyl ether such as an akloxyalkyl, a phenoxyaryl, a henoxyalkyl, or combinations thereof, having from 2 to 1,000 carbon atoms, or a substituted halogen, oxygen, sulfur, or nitrogen derivative thereof.
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